Classification Society of North America (CSNA) Welcome to the home page of the Classification Society of North America (CSNA). The CSNA is a nonprofit interdisciplinary organization whose purposes are to promote the scientific study of classification and clustering (including systematic methods of creating classifications from data), and to disseminate scientific and educational information ...

ETI is dedicated to improving on a global scale the quantity, quality and accessibility of taxonomic information on CD-ROMs and the online WBD.